public class Login {
    private String userName = "liamliam";
    private String password = "123456";

    public void loginInfo(String userName, String password)
            throws UserNameException, PasswordException {
        if (!this.userName.equals(userName)) {
            throw new UserNameException("用户名错误！");
        }
        if (!this.password.equals(password)) {
            throw new PasswordException("密码错误");
        }
        System.out.println("登陆成功！");
    }

    public static void main(String[] args) {
        try {
            Login login = new Login();
            login.loginInfo("feafaw", "123456");
        } catch (UserNameException e) {
            e.printStackTrace();
        } catch (PasswordException e) {
            e.printStackTrace();
        }
    }
}

